Yahoo Groups archive

Digital BW, The Print

Index last updated: 2026-04-28 22:56 UTC

Message

Re:Scanner/Conversion question

2002-09-17 by André Vallejo

Mark,you're making a hell of a confusion...what happens is that they are
scanning your film in RGB mode. Using a drum,probably in multipass
mode(guess a drum does it,I never came close to one) ,it\ufffds a waste of
time,maybe it's default to them. But you only need a third of the
information really,so forget about the 75megs,and work with the 25.
Actually,a 16 bits 8x10 file at 360 dpi is abou 16 megs,so I guess you are
getting very good scans,or your negatives are larger then 35mm...
[ ],Andr\ufffd




Message: 11
   Date: Mon, 16 Sep 2002 17:44:02 -0400
   From: MARK MAIO <markmaio@...>
Subject: Scanner/Conversion question

Being new to this list and digital printing, this might be a basic
question, so I apologize in advance if it is.

I am using a quad tone B&W printing system and having my B&W negatives
drum scanned. For the purpose of this question, I ask for the scan to be
for output at (X) dpi @ (X) size, which, for examples sake, gives me a
75 meg RGB file. When I open the file in PhotoShop and convert it to
gray scale, I end up with a 25 meg file, which now limits me to a
smaller size/resolution print.

So, I paid for a 75 meg scan but I can only use 25 megs of it. I could
pay for a 225 meg scan to get the 75 megs I need to use or I could find
a lab that would do custom gray scale drum scans, but I had another idea
I wanted to run by the group. Would it be possible to open the B&W image
as a RGB file and then convert/save each of the three color layers as a
separate gray scale layer of 25 megs each and somehow merge them
together to end up with a 75 meg gray scale file?

Thanks in advance,

Mark Maio

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.